Well, that's either an explod or a helper. Press ctrl+C, see if it has an axis. If it does, press ctrl+D until you think you've pinpointed it. You're gonna have to do some work to find out what sprite that actually IS, then we can see about getting rid of it.
It could also possibly be the screenpack calling some totally random number for the small portrait, and that random number is in use for kenshin. Does it actually have small portaits? If it doesn't, open up fight.def, find the line that defines it, set it back to 9000,0 and then use the pos stuff to place it off screen.